Radiotube



oct. lles, 192s. 1,687,897

, l 'C. SCHICKERLING RADI OTUBE FPiled Feb. 6, 1925' 14 i /5 w INVENTORBY f ORNEY Patented Oct. 16, 1928.

UNITED STATES PATENT OFFICE.

CONRAD SCHICKERLING, EAST ORANGE, NEW JERSEY, ASSIGNOR ONE-HALF T LILLIEE. SCHICKERLING AND HORTENSE SCHICKERLING, BOTH'. OF EAST ORANGE,

NEW JERSEY.

nAnIorUBE.

having a fourth element, a stabilizer, in addif tion to the usual orwell-known filament, grid, and plate elements sealed within a vacuumtube or bulb. rWith the foregoing and other obJe'cts 1n view theinvention consists in thelarrangement and combination of partshereinafter 2o described and claimed, andwhilefthe inven-l tionis notrestricted tothe exact detailsof ,construction disclosed or suggestedherein,a

still for the purpose of'illustrating a practical embodiment thereofreference 's had to 2o the accompanying drawings in fwhich vrlikereference characters designate the same `parts in the several views, andin Which- Figure 1 is a face view of a preferred embodiment of myimprovement, parts belng 1nv so section. x v l Fig. 2 is a. fragmentaryview of the interior parts taken substantially ata rlght angle to theview of Fig. 1 andwith parts broken Y away.

Fig. 1.

Fig. 4 .is an elevation of lmy vimprovement embodiedv in avmodied formof construction.

Referring now more specifically to the 4o drawings I indicate aradiotube comprising a bulb 10 cemented as usual into a base 11 carrying-theconventional four contact studs, 12

and 13 for the filament, 14 for thel grid, and' 15 for`the plate. 16 isthe pedestal for supf porting the interior fittings and through whichythe severalwi'res lead to the contact studs in the usual manner.

Alt 17 I indicate a suitable `filament leading from one support 18 toanother 19. The

mid portion of the lfament is supported upon a post 20 secured in thepedestal'. .-The s upports .18- and 19 are attached to filamentwlres 3is a cross section rron the line 3--3 of'.-

12a and 13a which lead to the corresponding `l studs 12 and 13.

A suitable form of grid is which in Figs. 1 and'2 is composed of upperand lower spaced parallel bars 22 between which are stretched a seriesof fine wires 23. Thelarnent 17 is held in position spaced from theWires 23 and preferably between the -two series thereof. The grid asjust described is supported at one end upon a dummy post 24 and at theother upon a connection from which a wire 26 leads to the stud 14.

In this form of the invention the plate elementconsists of a metal plate27 looped in spaced relation over and on the sides of the -grid andfilament, the lower .edge portions of the plate being connected to andsupported by a plate post 28 and a support 29 from whichl leads the wire3() to the contact stud 15.

The novel and added element constituting the principalY feature ofthisimprove- V1nent,.is known as a stabilizer and while it may be'exempliiedand practisedl in many different forms or embodiments, it is shown 1nFigs. yLand 2 as consisting of a composite plateistructure 3J. ofpolygonal form rbut having an open center 32-throu`gh which extends thel plate and other' elements just described in a direction substantiallyper envdicular tothe vgeneral plane of the stabi izer and spacedtherefrom. This elementis shown as embodying a pluralityofgiared wings3la spaced from each other and from the top of the plate 27. Thestabilizer, however, comprises two legs 33. on opposite sides a'ndspacedfromthe sides of/theplate 27, one/:of these.

legs being provided Witha supporting post v34 and theI other has asupporting member 35 from'whichhleads v'a' wire 36\through the pedestal16, thiswirejbeing united as by twisting with one of the'lam'ent wiresand sois 'attached thereby to one of the filamentstuds. While I indicatethis connecshown at 21 tionl with'the wire 13a and st-ud 13, the conmentwire.

The modification shown I term a power tube arrangement or construction,the'same being adapted for more nection might bemade with the otherfilapowerful,amplification or detection, but like `inthe `irstfform,with a remarkablylow avmperage in yproportion to the amplification inFig. 4 is what i and efficiency realized. In this form the `bulb 1()a isshown mounted upon or wit-hin a base 11 and provided with the standardfittings, the contact studs 12 to 15, the pedestal-16, and the usualthree elements as identied in the foregoing description. The filament17a is of the form in which a simple wire is supported or suspendedbetween two supports 18 and 19'l1 from which the wires 12a and 13arespectively extend to thestuds A 12 and 13. This filament 17 isstretched through the central space within a grid 21n in the form of acoil supported upon two supports 24: and 25, from the latter of whichleads a wire 26 to the contact stud 14. The plate 27 a is supported bymeans of two supports 28 and 29, from the latter of which leads a wire30 to the stud 15.

The stabilizer 31b in this form is shown as comprising three wings 31cflared away from one another and surrounding the plate 27 as by means ofopenings 32, This stablizer as in the previous form is supported by asupport 35 from which leads a wirel 36 united as by twisting with thefilament wire 13l as above descr1bed.

`As a result'of extensive experiments and practice of this invention invarious designs and forms I have established the fact that becauseof thefourth element or stabilizer it is possible to secure remarkable freedomfrom tube noises so commonly experienced with other tubes, but-thescientific reason for the effect I am not at this time able to explain.

I claim: l

1. In a radio tube, the combination with i filament, grid, and plateelements, of afourth stabilizing element to eliminate objectionable tubenoises, the stabilizing element being a plate disposed centrally and atright angles to the first mentioned plate, and having electricalconnection with the filament.

2. In a radio tube, the combination withv filament, grid, and plateelements, of a fourth stabilizing element to eliminate objectionabletube noises, the stabilizing element comprising a plate having anopening and throu h which the first mentioned late extends 1n spacedrelation in a directlon substantially perpendicular to the plane of the'stabilizer plate, said stabilizer plate having electrical connectionwith said filament.

3. In a radio tube, the combination with CONRAD scHICKEnLING.

.Y filament, grid, and plate elements, of a' fourth l

